Modeling of dust evolution in the Milky Way

Details Modeling of dust evolution in the Milky Way Modeling of dust evolution in the Milky Way

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009eimw.confe..71z&link_type=abstract

"The Evolving ISM in the Milky Way and Nearby Galaxies, The Fourth Spitzer Science Center Conference, Proceedings of the confere

Physics

1

Galaxies: Ism, Infrared: Galaxies, Infrared: Ism, Ism: Dust, Extinction, Ism: Structure

Scientific paper

The results of modeling dust evolution in the ISM of the Galaxy are presented. We combine a chemical evolution model of the Galaxy with a model for dust evolution in the ISM. Dust growth in the ISM and destruction by supernova shocks are included. To study dust growth in molecular clouds we develop a new model, in which dust production is determined by characteristic growth timescales of dust species in molecular clouds. We study carbon, silicates, iron and SiC dust species, discriminating between dust injected by AGB stars and supernovae, and dust grown in the ISM. The observed abundance ratios of presolar dust grains formed in SN ejecta and in AGB outflows require that for the ejecta from supernovae the fraction of refractory elements condensed into dust is quite small (~ 10-2 to 10-4)

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